Dead particles not included in render (F12), but visible in viewport #59272

New Issue

Enie Weiß · 2018-12-12T22:54:25+01:00

Enie Weiß commented

2018-12-12 22:54:25 +01:00

System Information
Operating system: macOS 10.14 Mojave
Graphics card:

Blender Version
Broken: 2.80, 9c5d104224, blender2.8, 2018-12-12
Worked: 2.79

Dead Particles that are properly rendered in the viewport are not being rendered using F12. This Bug occurs with Eevee, Workbench and Cycles render engines.

Create a new general file.
add two planes, translate one of them upwards a little bit.
add a particle system to the upper plane with
- in "Render" set "Render As" to "Object"
- in "Object" select the default cube as particle object.
- in "Extra" check Dead
make the bottom plane a collider and turn on "Kill Particles" on collision.
scale the cube down so you can see the particles falling down when starting the animation.
(optional) give the cube a more distinguishable material like dark red to be sure that there are no red spots in the rendered result.
when starting the animation and rendering the scene when some particles have gathered on the lower plane these dead particles will not be rendered.

**System Information** Operating system: macOS 10.14 Mojave Graphics card: **Blender Version** Broken: 2.80, 9c5d1042244, blender2.8, 2018-12-12 Worked: 2.79 Dead Particles that are properly rendered in the viewport are not being rendered using F12. This Bug occurs with Eevee, Workbench and Cycles render engines. 1. Create a new general file. 2. add two planes, translate one of them upwards a little bit. 3. add a particle system to the upper plane with - in "Render" set "Render As" to "Object" - in "Object" select the default cube as particle object. - in "Extra" check Dead 4. make the bottom plane a collider and turn on "Kill Particles" on collision. 5. scale the cube down so you can see the particles falling down when starting the animation. 6. (optional) give the cube a more distinguishable material like dark red to be sure that there are no red spots in the rendered result. 7. when starting the animation and rendering the scene when some particles have gathered on the lower plane these dead particles will not be rendered.

Enie Weiß commented

2018-12-12 22:54:25 +01:00

Added subscriber: @enie

Philipp Oeser commented

2018-12-13 09:42:03 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2018-12-13 09:42:03 +01:00

Confirmed, checking...
#59272.blend

Confirmed, checking... [#59272.blend](https://archive.blender.org/developer/F5939530/T59272.blend)

Philipp Oeser commented

2018-12-13 11:19:48 +01:00

Hm, make_duplis_particle_system() seems to be making duplis for dead particles in DAG_EVAL_RENDER as well as DAG_EVAL_VIEWPORT...
Not sure yet why these are not actually rendered, needs further investigation...

Hm, `make_duplis_particle_system()` seems to be making duplis for dead particles in `DAG_EVAL_RENDER` as well as `DAG_EVAL_VIEWPORT`... Not sure yet why these are not actually rendered, needs further investigation...

Ali murtaza commented

2019-10-14 12:35:38 +02:00

Added subscriber: @486213975.ali

Ali murtaza commented

2019-10-14 12:35:38 +02:00

I still have same problem. Pls tell ıf there is any progress..

Bjørn-Andre commented

2020-01-16 14:02:02 +01:00

Added subscriber: @BacMan12

Bjørn-Andre commented

2020-01-16 14:02:02 +01:00

Also encountered this today. Would be nice with a fix but particle nodes is coming, so it will probably be fixed then...hopefully.

Jeroen Bakker commented

2020-01-20 12:34:47 +01:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2020-01-20 12:34:47 +01:00

Seems depsgraph related.

When rendering the particles that aren't born are already visible

In viewport the particles that are dead are still visible.

Seems depsgraph related. When rendering the particles that aren't born are already visible In viewport the particles that are dead are still visible. ![image.png](https://archive.blender.org/developer/F8289525/image.png)

David Spencer commented

2020-03-02 03:08:23 +01:00

Added subscriber: @GravityDefyingSpaceLizards

David Spencer commented

2020-03-02 03:08:23 +01:00

The dead particles are being re-spawned on the emitter as they die. I did some trouble-shooting on this, comparing 2.79 to my current version. I'm currently using 2.81.16. .
I created the setup as described in the above original post in 2.79. All works properly.
I then saved the scene and reopened it in 2.81. It still rendered correctly.
I then created an identical particle system in 2.81 next to the imported 2.79 system. The 2.79 particles rendered ok, but the 2.81 particles did not.
If I change the 2.81 emitter to the 2.79 particle setting, it still does not render correctly.
If I change the 2.79 emitter to the 2.81 particle setting it still renders correctly.
I tried breaking the 2.79 particle emitter, and the only way I could do it was to change the number of particles emitted. Then it will not render properly, Undoing the change will correct the render.

The dead particles are being re-spawned on the emitter as they die. I did some trouble-shooting on this, comparing 2.79 to my current version. I'm currently using 2.81.16. . I created the setup as described in the above original post in 2.79. All works properly. I then saved the scene and reopened it in 2.81. It still rendered correctly. I then created an identical particle system in 2.81 next to the imported 2.79 system. The 2.79 particles rendered ok, but the 2.81 particles did not. If I change the 2.81 emitter to the 2.79 particle setting, it still does not render correctly. If I change the 2.79 emitter to the 2.81 particle setting it still renders correctly. I tried breaking the 2.79 particle emitter, and the only way I could do it was to change the number of particles emitted. Then it will not render properly, Undoing the change will correct the render.

Edward commented

2020-03-06 05:24:56 +01:00

Added subscriber: @edferr

Edward commented

2020-03-06 05:24:56 +01:00

In #59272#883120, @GravityDefyingSpaceLizards wrote:
The dead particles are being re-spawned on the emitter as they die. I did some trouble-shooting on this, comparing 2.79 to my current version. I'm currently using 2.81.16. .
I created the setup as described in the above original post in 2.79. All works properly.

I then saved the scene and reopened it in 2.81. It still rendered correctly.
I then created an identical particle system in 2.81 next to the imported 2.79 system. The 2.79 particles rendered ok, but the 2.81 particles did not.
If I change the 2.81 emitter to the 2.79 particle setting, it still does not render correctly.
If I change the 2.79 emitter to the 2.81 particle setting it still renders correctly.
I tried breaking the 2.79 particle emitter, and the only way I could do it was to change the number of particles emitted. Then it will not render properly, Undoing the change will correct the render.

great work, had the same problem. precisely the issue, i can only add a work-around, more of a kludge. for still images at least you can "convert to mesh". i used it for a metaball particle soup and it worked, haha. thanks again.

> In #59272#883120, @GravityDefyingSpaceLizards wrote: > The dead particles are being re-spawned on the emitter as they die. I did some trouble-shooting on this, comparing 2.79 to my current version. I'm currently using 2.81.16. . > I created the setup as described in the above original post in 2.79. All works properly. > I then saved the scene and reopened it in 2.81. It still rendered correctly. > I then created an identical particle system in 2.81 next to the imported 2.79 system. The 2.79 particles rendered ok, but the 2.81 particles did not. > If I change the 2.81 emitter to the 2.79 particle setting, it still does not render correctly. > If I change the 2.79 emitter to the 2.81 particle setting it still renders correctly. > I tried breaking the 2.79 particle emitter, and the only way I could do it was to change the number of particles emitted. Then it will not render properly, Undoing the change will correct the render. great work, had the same problem. precisely the issue, i can only add a work-around, more of a kludge. for still images at least you can "convert to mesh". i used it for a metaball particle soup and it worked, haha. thanks again.

Artturi Mäntysaari commented

2020-06-10 22:28:08 +02:00

Added subscriber: @ArtturiMantysaari

Artturi Mäntysaari commented

2020-06-10 22:28:08 +02:00

I am also having this bug in Blender version 2.83

blender-admin commented

2020-09-21 10:46:35 +02:00

This issue was referenced by b8b60e132d

This issue was referenced by b8b60e132d0382bb360855e52f2f7c522625ca98

Jacques Lucke commented

2020-09-21 10:47:05 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jacques Lucke closed this issue

2020-09-21 10:47:05 +02:00

Jacques Lucke self-assigned this 2020-09-21 10:47:05 +02:00

Berat commented

2020-10-01 19:04:24 +02:00

Added subscriber: @BeratTurkbikmaz

Berat commented

2020-10-01 19:04:24 +02:00

Arrow Rain Test.blend
I struggling this issue. I tried in 2.83.7 and 2.90.1. But result is the same. This attached project is almost similar to which I want to create an arrow rain scene. Dead particles still not showing in the render.

[Arrow Rain Test.blend](https://archive.blender.org/developer/F8944548/Arrow_Rain_Test.blend) I struggling this issue. I tried in 2.83.7 and 2.90.1. But result is the same. This attached project is almost similar to which I want to create an arrow rain scene. Dead particles still not showing in the render. ![Screenshot 2020-10-01 200209.jpg](https://archive.blender.org/developer/F8944545/Screenshot_2020-10-01_200209.jpg)

R M commented

2020-10-14 18:34:39 +02:00

Added subscriber: @RMENON

R M commented

2020-10-14 18:34:39 +02:00

I encountered this issue today in 2.90

Angelo Ignotus commented

2023-10-17 00:11:36 +02:00

Encountered what i believe to be the same issue in 3.6.4
On further examination, there was merely a discrepancy between viewport and render, somehow caused by a low cache step size. This may be something worth looking into.
In the file in question, I have an emitter several thousand units above the killer platform.

Encountered what i believe to be the same issue in 3.6.4 On further examination, there was merely a discrepancy between viewport and render, somehow caused by a low cache step size. This may be something worth looking into. In the file in question, I have an emitter several thousand units above the killer platform.

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Dead particles not included in render (F12), but visible in viewport #59272